Custom component learning and Summarization

By combining two textviews with one checkbox and one view into a custom control, you can customize its attributes.

1 first, the layout file set_item_view.xml is provided:

<? XML version = "1.0" encoding = "UTF-8"?>
<Relativelayout xmlns: Android = "http://schemas.android.com/apk/res/android"
Android: layout_width = "fill_parent"
Android: layout_height = "65dip">

Android: Id = "@ + ID/TV _tittle"
Android: layout_width = "wrap_content"
Android: layout_height = "wrap_content"
Android: layout_marginleft = "10dip"
Android: layout_margintop = "10dip"
Android: textcolor = "#000000"
Android: textsize = "20sp"/>

Android: Id = "@ + ID/TV _des"
Android: layout_width = "wrap_content"
Android: layout_height = "wrap_content"
Android: layout_below = "@ ID/TV _tittle"
Android: layout_marginleft = "10dip"
Android: textcolor = "#88000000"
Android: textsize = "18sp"/>

Android: clickable = "false"
Android: Id = "@ + ID/cb_status"
Android: layout_width = "wrap_content"
Android: layout_height = "wrap_content"
Android: layout_alignparentright = "true"
Android: layout_centervertical = "true"
Android: layout_marginright = "10dip"/>

<View
Android: layout_width = "fill_parent"
Android: layout_height = "0.2dip"
Android: layout_alignparentbottom = "true"
Android: layout_marginleft = "5dip"
Android: layout_marginright = "5dip"
Android: Background = "#000000"/>

</Relativelayout>

2. Customize a class, integrate relativelayout, and implement some of the methods.

public class SetItemView extends RelativeLayout {    private CheckBox cb_status;    private TextView tv_tittle;    private TextView tv_des;    private String deson;    private String desoff;    private void initview(Context context) {        View.inflate(context, R.layout.set_item_view, SetItemView.this);        cb_status = (CheckBox) findViewById(R.id.cb_status);        tv_tittle = (TextView) findViewById(R.id.tv_tittle);        tv_des = (TextView) findViewById(R.id.tv_des);    }    public SetItemView(Context context, AttributeSet attrs, int defStyle) {        super(context, attrs, defStyle);        initview(context);    }    public SetItemView(Context context, AttributeSet attrs) {        super(context, attrs);        initview(context);        String tittle = attrs.getAttributeValue(                "http://schemas.android.com/apk/res/com.djf.mobilesafty",                "tittle");        deson = attrs.getAttributeValue(                "http://schemas.android.com/apk/res/com.djf.mobilesafty",                "deson");        desoff = attrs.getAttributeValue(                "http://schemas.android.com/apk/res/com.djf.mobilesafty",                "desoff");        tv_tittle.setText(tittle);        SetDesc(desoff);    }    public SetItemView(Context context) {        super(context);        initview(context);    }    // 判断组件是否被选中    public boolean isChecked() {        return cb_status.isChecked();    }    // 设置组件状态    public void SetChecked(boolean checked) {        if (checked) {            tv_des.setText(deson);        }        else {            tv_des.setText(desoff);        }        cb_status.setChecked(checked);    }    // 设置描述信息    public void SetDesc(String string) {        tv_des.setText(string);    }}

3. Implement attributes of custom composite controls
First define a custom namespace xmlns: DJF = "http://schemas.android.com/apk/res/com.djf.mobilesafty"

Special attention should be paid to the red font. One is the naming control and the other is the package name.

Then you can customize attributes.

Android: Id = "@ + ID/siv_update"
Android: layout_width = "wrap_content"
Android: layout_height = "wrap_content"
DJF: desoff = "automatic upgrade disabled"
DJF: deson = "automatic upgrade enabled"
DJF: tittle = "Set automatic upgrade status">

<Com. DJF. mobilesafty. UI. setitemview
Android: Id = "@ + ID/siv_update"
Android: layout_width = "wrap_content"
Android: layout_height = "wrap_content"
DJF: desoff = "the mobile phone anti-theft status has been disabled"
DJF: deson = "the mobile phone anti-theft status has been enabled"
DJF: tittle = "set mobile phone anti-theft status">
</COM. DJF. mobilesafty. UI. setitemview>

The red font above indicates the package name of the custom class above ~~~~

Now, a simple custom component and its attributes are introduced. You can also define and click Properties for the custom component ~~~~

Custom component learning and Summarization